U.S. Secretary of State John Kerry arrives in Baghdad, Iraq, Sept. 10, 2014.

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U.S. Secretary of State John Kerry, left, listens to new Iraqi Prime Minister Haider al-Abadi during a meeting in Baghdad, Iraq, Sept. 10, 2014.

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U.S. Secretary of State John Kerry, center left, speaks to new Iraqi Prime Minister Haider al-Abadi, center right, during a meeting in Baghdad, Iraq, Sept. 10, 2014.

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U.S. Secretary of State John Kerry, who arrived in Baghdad on Wednesday as he began a tour of the Middle East to build a coalition against the Islamic State militants, looks out over Baghdad from a helicopter, Sept. 10, 2014.

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U.S. Secretary of State John Kerry, front left, looks over papers while flying from Jordan to Iraq, Sept. 10, 2014.